_pew: move to common-hal

I noticed that this code was referring to samd-specific functionality,
and isn't enabled except in one samd board (pewpew10).  Move it.

There is incomplte support for _pew in mimxrt10xx which then caused build
errors; adding a #if guard to check for _pew being enabled fixes it.
The _pew module is not likely to be important on mimxrt but I'll leave the
choice to remove it to someone else.

ports/atmel-samd/supervisor/port.c

@@ -85,7 +85,9 @@
 #if CIRCUITPY_GAMEPADSHIFT
 #include "shared-module/gamepadshift/__init__.h"
 #endif
-#include "shared-module/_pew/PewPew.h"
+#if CIRCUITPY_PEW
+#include "common-hal/_pew/PewPew.h"
+#endif
 
 extern volatile bool mp_msc_enabled;
 

ports/atmel-samd/timer_handler.c

@@ -31,7 +31,7 @@
 
 #include "common-hal/pulseio/PulseIn.h"
 #include "common-hal/pulseio/PulseOut.h"
-#include "shared-module/_pew/PewPew.h"
+#include "common-hal/_pew/PewPew.h"
 #include "common-hal/frequencyio/FrequencyIn.h"
 
 extern void _PM_IRQ_HANDLER(void);

ports/mimxrt10xx/supervisor/port.c

@@ -53,7 +53,9 @@
 #if CIRCUITPY_GAMEPADSHIFT
 #include "shared-module/gamepadshift/__init__.h"
 #endif
+#if CIRCUITPY_PEW
 #include "shared-module/_pew/PewPew.h"
+#endif
 #include "supervisor/shared/tick.h"
 
 #include "clocks.h"

py/circuitpy_defns.mk

@@ -259,6 +259,8 @@ SRC_COMMON_HAL_ALL = \
 	_bleio/PacketBuffer.c \
 	_bleio/Service.c \
 	_bleio/UUID.c \
+	_pew/__init__.c \
+	_pew/PewPew.c \
 	analogio/AnalogIn.c \
 	analogio/AnalogOut.c \
 	analogio/__init__.c \
@@ -396,8 +398,6 @@ SRC_SHARED_MODULE_ALL = \
 	terminalio/__init__.c \
 	uheap/__init__.c \
 	ustack/__init__.c \
-	_pew/__init__.c \
-	_pew/PewPew.c \
 	_eve/__init__.c
 
 # All possible sources are listed here, and are filtered by SRC_PATTERNS.

shared-bindings/_pew/PewPew.c

@@ -31,7 +31,7 @@
 #include "shared-bindings/digitalio/DigitalInOut.h"
 #include "shared-bindings/util.h"
 #include "PewPew.h"
-#include "shared-module/_pew/PewPew.h"
+#include "common-hal/_pew/PewPew.h"
 #include "supervisor/shared/translate.h"
 
 //| class PewPew:

shared-bindings/_pew/__init__.c

@@ -27,7 +27,7 @@
 #include "py/runtime.h"
 #include "py/mphal.h"
 #include "PewPew.h"
-#include "shared-module/_pew/PewPew.h"
+#include "common-hal/_pew/PewPew.h"
 
 STATIC mp_obj_t get_pressed(void) {
     pew_obj_t *pew = MP_STATE_VM(pew_singleton);